According to the Chilton's manual I have cover 1994-1999 (this should be relative to what you have though...
You need to get a "torsion bar unloader tool" to release the tension on the torsion bar adjusting screw. This looks like a C-clamp, basically. I believe it's GM part # J36202 (at least that's what's written in the manual... From what I read a regular C-clamp could work but the potential for mishap is great. BE VERY CAREFUL. It may fly at and hit you at high speed if you don't use the right part.
Remove the adjuster screws
Then move the torsion bar forward and leave it in place.
remove the adjuster arms (where the screws came from).
Unfasten the nut and square washer (raise teh support out of the way) from the retainer then remove the retainer bolts from underneath the frame.
Slide the insulator off the support and remove it from the vehicle.
Disconnect the muffler flange from the converter, loosen the rear exhaust hanger and lower the rear exhaust.
Remove the torsion support from the frame.
Remove the bars from the lower control arms.
Also, I would call Trailmaster and get them to send you some documents through fax or something. Those instructions are very important!
HOpe that helps.
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